Jody was a fashion model who also served as a "call" girl for nobles of the community. She lived with another woman, named Ellen. Once they attended a "call" for a dinner, where Ellen was forced to perform deviant sexual activities. She then left Jody who left with her boyfriend Lam, formerly a policeman but now a truck diver. One day, Jody's corpse was found floating in the Victoria Harbor waters. The investigation of this murder case was taken up by Superintendent Ching, and assisted by Tit Nam, who had just graduated from the Police Training School. They located Lam, who after hard persuasion, agreed to assist Ching...